Wire electric-discharge machining apparatus, wire electric-discharge machining method, and control device

摘要

A control device of the wire electric-discharge machining apparatus includes a speed-ratio computing unit that calculates machining speed information related to a corner machining speed in a corner machining portion corresponding to an amount of machining in the corner machining portion, on the basis of NC data, a feedback machining-speed computing unit that calculates, as a feedback machining speed to be used for feedback control of wire electric-discharge machining, a machining speed corresponding to an inter-electrode state between a wire electrode and a workpiece measured during wire electric-discharge machining, and a multiplier that calculates a machining speed to be used for control of a machining device at a time of machining the corner machining portion, on the basis of the machining speed information and the feedback machining speed.

主权项

1. A wire electric-discharge machining apparatus comprising:
a machining device that performs wire electric-discharge machining on a linear machining portion and a corner machining portion of a workpiece by using a wire electrode; and a control device that controls the machining device, wherein the control device includes
a corner-speed computing unit that calculates machining speed information related to a corner machining speed in the corner machining portion corresponding to an amount of machining in the corner machining portion, on a basis of NC data being a machining program to be used at a time of performing wire electric-discharge machining on the workpiece,a feedback computing unit that calculates, as a feedback machining speed to be used for feedback control of the wire electric-discharge machining, a machining speed corresponding to an inter-electrode state between the wire electrode and the workpiece measured during the wire electric-discharge machining, andan output-speed computing unit that calculates a control machining speed to be used for control of the machining device at a time of machining the corner machining portion, on a basis of the machining speed information and the feedback machining speed, the machining speed information is a speed ratio being a ratio of the corner machining speed to a linear machining speed in the linear machining portion corresponding to an amount of machining in the linear machining portion, and the output-speed computing unit calculates the control machining speed by multiplying the feedback machining speed by the speed ratio.